Objects can define their behavior with format() by defining
__format__. See
https://docs.python.org/3/reference/datamodel.html#object.__format__.
We should implement it, since we can potentially format at a higher
precision than float(). Does mpmath implement it?
Aaron Meurer
On Thu, Jun 12, 2014 at 8:06 PM, Amit Saha <amitsaha...@gmail.com> wrote:
> On Thu, Jun 12, 2014 at 7:26 AM, Sergey Kirpichev <skirpic...@gmail.com>
> wrote:
>>
>>
>> On Monday, June 9, 2014 5:35:34 AM UTC+4, Amit Saha wrote:
>>>
>>> I came across this:
>>>
>>> >>> from sympy import Float
>>> >>> Float(1.25343)
>>> 1.25343000000000
>>>
>>> >>> '{0:.2f}'.format(Float(1.25343))
>>> Traceback (most recent call last):
>>> File "<stdin>", line 1, in <module>
>>> ValueError: Unknown format code 'f' for object of type 'str'
>>>
>>> Is this known/expected? Shouldn't it work?
>>
>>
>> Why? "f" stands for builtin float, not Float.
>
> Yes, never mind. I forgot about how Python's numbers and SymPy's
> numbers interact.
>
>
>
>
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